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Residential battery comparison profile

GoodWe

GoodWe
ESA Three-phase Retrofit

AC-coupled three-phase storage for homes retaining a separate solar inverter.

Research-based opinionConfirmed Australian residential pageChecked 13 November 2026
GoodWe ESA Three-phase Retrofit product visual5–106.2 kWh
01

Manufacturer-sourced facts

What it is.

These are product facts, not a score or endorsement.

Request an installed quote for the exact inverter, battery stack and backup hardware.

Usable capacity range
5–106.2 kWh
Published output
5–29.999 kW rated AC, subject to battery output
Architecture
AC-coupled
Phase support
Three-phase
Backup
Backup capable
Warranty
10-year limited inverter and G20 battery warranties, subject to terms. Confirm G21 coverage.
Cell chemistry
LFP
CEC status checked
9 BTA battery-only inverter codes listed through 1 July 2029. Lynx D G2 module listings run through 31 December 2027.
Standout specification
BTA inverter with no direct solar input. The data sheet documents up to twelve battery modules and six per column.
Show 15 model variants

These model names sit inside the family above. Capacity, phase and output still need to match the installed configuration.

  • GW5K-BTA-G20
  • GW6K-BTA-G20
  • GW8K-BTA-G20
  • GW9.999K-BTA-G20
  • GW12K-BTA-G20
  • GW15K-BTA-G20
  • GW20K-BTA-G20
  • GW25K-BTA-G20
  • GW29.999K-BTA-G20
  • GW5.1-BAT-D-G20
  • GW5.1-BAT-D-G21
  • GW8.3-BAT-D-G20
  • GW8.3-BAT-D-G21
  • GW6.0-BAT-D-G20
  • GW9.0-BAT-D-G20
02

Our opinion

The buying view.

EDITORIAL OPINION - BASED ON THE CITED RESEARCH
“The Australian BTA data sheet names all six Lynx D G2 codes, including the 6 and 9 kWh variants. The inverter and battery both limit sustained power.”
Best suited to
Retaining a separate rooftop solar inverter while adding modular storage
What stands out
BTA inverter with no direct solar input. The data sheet documents up to twelve battery modules and six per column.
03

Cons and watch-outs

What to check before buying.

These are configuration trade-offs and questions to verify, not claims that the product is defective.

  • Adding new solar panels requires a separate solar inverter. Check the equipment schedule and installed price.
  • Ask the installer which circuits can run in an outage and whether the separate solar inverter can operate during backup.

Ask for these points to be answered against the exact model numbers and installed configuration in your quote.

04

Evidence trail

Check the sources.

Specifications can change by model revision, region and paired hardware. CEC approval is not proof of current availability or suitability. Confirm the model and final design with the manufacturer and an accredited Australian installer.

GoodWe Australia - ESA BTA AC-coupled data sheetOpen manufacturer source ↗GoodWe Australia - ESA system rangeOpen supporting source ↗GoodWe - Australian inverter warrantyOpen supporting source ↗GoodWe - Australian Lynx D G2 battery warrantyOpen supporting source ↗Clean Energy Council - inverters registerOpen supporting source ↗Clean Energy Council - batteries registerOpen supporting source ↗CEC series: Lynx D G2, ESASearch the household-scale approval register →Is something outdated or incorrect?Contact TechManPat with an update →

Evidence check

Last checked

Australian sources
Specifications last checked
13 November 2026
Price last checked
No separate price check recorded
Australian availability last checked
13 November 2026

What changed

No material change logged.

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